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No se puede acceder a las variables de clase o al método dentro de una función de cierre

Estoy tratando de acceder a un método de una clase dentro de una función asignada a un evento websocket, incluso si lo llamo con la palabra clave 'esta', la función no puede verlo.

 'use strict'; let clientSocket = undefined; window.addEventListener("load", function() { class ClientSocket { id = undefined; constructor(id) { this.id = id; } printMsg = (obj) => { if (obj === null || obj === undefined) return; if (this.isDebug) { console.debug(obj) } } conecta() { const url = "ws://localhost:5000"; this.printMsg('URL: ' + url) const socket = new WebSocket(url); //on open socket.onopen = function (event) { this.printMsg("SOCKET OPEN"); //CAN'T ACCESS THIS METHOD EVEN WITH 'THIS' } this.socket = socket; } } clientSocket = new ClientSocket(1); });

En el evento onopen socket, la función no puede acceder al método printMsg() desde ClientSocket.

about 4 years ago · Juan Pablo Isaza
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